What effect does the loss of volatiles have on asphalt shingles?

Asphalt shingles contain various volatile compounds that contribute to their flexibility and durability. When these volatiles evaporate over time, especially due to exposure to heat and sunlight, the shingles lose their inherent elasticity. This loss of flexibility makes the shingles more susceptible to cracking and brittleness. Consequently, as the shingles become more brittle, they are less capable of withstanding the stresses imposed by weather changes, physical impacts, and thermal expansion and contraction. Thus, the correct answer highlights a significant degradation in performance due to the loss of volatiles, impacting the overall lifespan and functionality of the shingles.